Any Garmin HRM Experts?

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xcmum
xcmum Posts: 136
in Fitness and Exercise
This was from my flat run today..
Just wondering if the spike at the start is from the strap not being tight enough or something similar? As i'm sure my HR wasn't that high. My average was 176. I also use a Forerunner 410.
Does anyone else get this on their runs?

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